GNU wget up to 1.20 xattr.c set_file_metadata credentials management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in GNU wget up to 1.20. The affected element is the function set_file_metadata of the file xattr.c. This manipulation causes credentials management. This vulnerability is handled as CVE-2018-20483. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in GNU wget up to 1.20 (Automation Software). Affected by this vulnerability is the function set_file_metadata of the file xattr.c. The manipulation with an unknown input leads to a credentials management vulnerability. The CWE definition for the vulnerability is CWE-255. As an impact it is known to affect confidentiality. The summary by CVE is:

set_file_metadata in xattr.c in GNU Wget through 1.20 stores a file's origin URL in the user.xdg.origin.url metadata attribute of the extended attributes of the downloaded file, which allows local users to obtain sensitive information (e.g., credentials contained in the URL) by reading this attribute, as demonstrated by getfattr. This also applies to Referer information in the user.xdg.referrer.url metadata attribute. According to 2016-07-22 in the Wget ChangeLog, user.xdg.origin.url was partially based on the behavior of fwrite_xattr in tool_xattr.c in curl.

The bug was discovered 12/26/2018. The weakness was released 12/26/2018 (Website). It is possible to read the advisory at git.savannah.gnu.org. This vulnerability is known as CVE-2018-20483 since 12/26/2018. Attacking locally is a requirement. A single authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 121284 (openSUSE Security Update : wget (openSUSE-2019-57)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351499 (Amazon Linux Security Advisory for curl: ALAS-2019-1151).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (121284) and SecurityFocus (BID 106358†). Entries connected to this vulnerability are available at VDB-121339 and VDB-133155. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Automation Software

Vendor

• GNU

Name

• wget

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Credentials management
CWE: CWE-255
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 121284
Nessus Name: openSUSE Security Update : wget (openSUSE-2019-57)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/26/2018 🔍
12/26/2018 +0 days 🔍
12/26/2018 +0 days 🔍
12/26/2018 +0 days 🔍
12/26/2018 +0 days 🔍
12/26/2018 +0 days 🔍
01/22/2019 +27 days 🔍
03/23/2019 +60 days 🔍
06/22/2023 +1552 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: RHSA-2019:3701
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-20483 (🔍)
GCVE (CVE): GCVE-0-2018-20483
GCVE (VulDB): GCVE-100-128431
SecurityFocus: 106358 - GNU wget CVE-2018-20483 Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 12/26/2018 21:20
Updated: 06/22/2023 08:47
Changes: 12/26/2018 21:20 (74), 04/24/2020 12:39 (6), 06/22/2023 08:47 (4)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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